A negative AO allows the colder air to come south and then all you have to do is figure out where in the Northern Hemisphere the Jet Stream will guide it.
Here's the Current Arctic Oscillation Index, again coming down toward negative:

Natural gas prices surged to a three-week high, adding to a recent
string of big gains as colder weather and other signs point to a more
balanced market in the weeks to come.

Futures for January
delivery recently traded up 15.2 cents, or 7.5%, at $2.181 million
British thermal units on the New York Mercantile Exchange. It would be
the third session of five in which gas gains more than 5%. The market is
now up 24% in just six sessions since it settled at a 16-year-low on
Dec. 17.

Exceptionally warm forecasts are starting to give way
to the first signs of winter cold, keenly important in a market driven
by the demand for winter heating. Above-normal temperatures are still
going to linger in large parts of the East Coast--and many of the
biggest markets for gas heat--but cold from the west is starting to
spill into big Midwestern heating markets, too.

There are also
signs that gas producers are also making a stark pullback from
record-high production. The latest count of working natural-gas rigs,
released late Wednesday, showed another decline, putting the number of
working rigs at the lowest point ever in 28 years of data gathered by Baker Hughes Inc. It has fallen 16% in three weeks, even from numbers that were already near a record low.

These
changing trends have pushed many bears to cash out and lock in profits
from the steep drop in prices this fall. Since August, money managers
have had nearly two bearish positions on gas for every one bullish
position. A market leaning that heavily in one direction is often
vulnerable to these types of sharp rallies as those traders have to buy
back contracts to close out positions....MORE

When we posted the AO story we did something we try not to do, we hedged as to the timing and posted both the January and February prices where usually we only use the front month, make a declarative statement and figure our readers are smart enough to go further out on the calendar or put together some fancy spreads or use the options on the futures as may be their wont.